A waste of time! The description for this item is 6.25 x 6.25 x 3. The actual dimensions of the hole saw are 6.25 x 6.25 x 1.5. According to MaxTool, the description refers to the box the hole saw came in, which measures 6.5 x 6.5 x 2.5. I've been a contractor for thirty years, so I know when I say that this article doesn't offer additional depth of cut. Regarding the max instrument to be honest they said they would refund the money but I missed the refund date according to Revain. Total waste and incompetence.